<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>箭头函数的参数</title>
</head>
<body>
     <script>
        const getSum=(...arr)=>{
            let sum=0
            arr.map(function(item){
               sum+=item
            })
            return sum
        }
        console.log(getSum(1,2,3,4,5,6,7,8))
        
     </script>
</body>
</html>